Machine for sawing stone



May 29, 1951 E. MINKLER ET AL MACHINE FOR SAWING STONE Filed July 18,1949 s Shets-$heet 1 ATTORNEX May 29, 1951 E. MINKLER ET AL MACHINE FORSAWING STONE 3 Sheet s IN V EZN T EZ/e fi M 7; By U A R/VE):

E. MINKLER ET AL MACHINE FOR SAWING STONE 3 Sheet-Sheet 3 Filed July 18,1949 INVEN TOR: .EversiZMirgkZen BY Floflcl ECMLnkZeY; flzam/ am A TTOR/VEY- Patented May 29 1951 UNITED STATES? PATENT OFFICE MACHINE FORSAWING- S'IIONE Ever Minkl r Pasa na, and El y! Mink cr, Los. An l s, Cait.

Application July 18, 1949, Serial No. 105,4 1

(CL. l2 5..s17)

laims. 1

This. invention relates to. machines for sawin stone, such as marble andthe like, and it, is an improvement: on our apparatus for sawing: stonedisclosed in our United States Letters Patentv No. 2,411,585, issuedNovember 2.6., 19%..

The general object of the invention is. to pro.- vide an improvedmachine; for sawing stone, and particularly marblel which will. sawstone faster than is possible with other stone-sawing m chines.

Other objects. and advantages will appear hereinafter as thisvspecification progresses.

The invention is: illustrated in the annexed drawing, which forms a partof this specification,

and in which:

Fig. 1 is a side elevation of our invention;

Fig. 2 is a plan, view of our invention;

Fig. 3. is. a transverse vertical section of our invention taken on line3-.-.3 of Fig. 1;-

Fig. 4' is a fragmentary side elevation, on an enlarged scale, ofcertain features of construction of our invention;

Fig. 5 is a fragmentary side, elevation of the saw of our invention onan enlarged scale;

Figs. 6, 7 and 8 are side views of the machine saw, showing the saw indifferent sawing posi-. tions;

Fig. 9 is a horizontal section taken on line 9-9 of Fig. 1 showingcertain details of con struction,

Referring more particularly to the drawings, in which the same parts aredesignated by the same reference numerals in all ofthe views, Idesignates a supporting frame upon which the operating parts of ourinvention are supported, which frame comprises a pair of spaced parallelhori-- zontal base beams 2, and a pair of spaced end upright framemembers 3 which rest upon and are bolted to said horizontal base beams 2by bolts t. On the inner sides of said upright frame members are securedvertical plates 5 which are formed at their inner sides with verticaldovetail tongues 6.

A horizontal vertically slidable saw-carriage 1 comprises a pair ofspaced parallel horizontal side I-beams 8 and a pair of transverse endblocks 9, which connect the corresponding ends, respectively, of saidside beams, and said end blocks are provided in their outer sides withdovetail grooves H] which slidably receive the dovetail tongues 6 on theupright plates 5, whereby the saw carriage frame upright members 3 toslide vertically up or down on said frame members.

A pair of vertical screw rods H are located at the inner sides of thevertical plates 5 secured z. to the inner sides of the upright framemembers 3, which screw rods are journaled at their lower ends inbearings l2 formed on the lower ends of the tongues 6- on said plates 5,while the upper ends of said screw rods II are journaled in bearings ISin horizontal plates [4 and extend upwardly through said plates, whichare secured on the upper ends of said upright frame members 3 and extendinwardly beyond the upper side of said frame. members, in whichextending portions of said plates I4 are located said bearings l3.Thescrewrods l I extend through vertical threaded bores l5 in the endblocks 9 of the saw carriage l, the threads of which screw rods engagethe threads of said threaded bores, whereby said saw carrier is moved upor down as said screw rods are rotated in one direction or the other, inthe manner hereinafter more fully described. The bores i5 are formedpartlyin the slide blocks 9 proper and partly in vertical bosses 9'formed on said blocks in the dovetail grooves ll] of said blocks, andthe dovetail tongues 6 of the plates 5, are provided with verticalarcuate grooves 6 which receive said bosses and permit vertical movementof the bosses therein as the carriage I is raised .or lowered. Beveledpinions I6 are secured on the upper ends of the screw rods H, with thehubs I! of said pinions turnably resting upon the plates l 4 andsupporting said screw rods at their upper ends against downwarddisplacement. Said beveled pinions I6 mesh with beveled pinions l8secured on the ends, respectively, of a horizontal shaft l9 journaled inbearings 20 mounted on brackets 2| upstanding from'the horizontal platesM, which shaft l9 extends through and outwardly beyond the beveledpinion I8 at one end of the machine, and through another bearing 22secured on the outer end of the plate M secured on the upper end of theupright frame member 3' at said end ofthe machine. A pulley 23 issecured on the outer end of said shaft is beyond the bearing 22', overwhich pulley may be extended a belt from a pulley of a feed mechanism(not shown), for raising or lowering the 'saw carriage I and partsmounted thereon,

through the medium of said shaft l9, beveled pinions l8 and I6 and screwrods ll, in the man.- ner and for the purpose hereinafter more fullydescribed.

To the under side of the longitudinal horizontal side beams 8 of the sawcarriage 1, near one end of said beams, are secured a pair of blocks 24,respectively, and to the under side of said blocks are secured a pair ofbearings 25, respectively, in which bearings is journaled a crank shaft26 extending transversely of said saw carriage under the side beams 8thereof, on one end of which crank shaft is formed a crank 21, whichcomprises a radial crank bar 28, secured nearer one end than the otherend thereof, on said end of said crank shaft, and a crank pin 29 securedat one end to the shorter arm 30 of said crank bar 28 and extendingoutwardly from said crank bar, as shown in Figs. 1, 2 and 3 of thedrawings. A balance hand wheel 3| is secured on the end of the crankshaft 26 opposite the end on which the crank 21 is formed.

On the upper side of the saw carriage a plate 32 rests upon the upperside of the side beams 8 of said carrier and is secured to said sidebeams by bolts 33. A motor 34 is mounted on said plate 32, and belts 35extend over a pulley 36 on the shaft 31 of said motor, and over a pulley38 secured on the crank shaft 26, whereby said crank shaft is rotated bysaid motor.

To the under side of the longitudinal horizontal beams 8 of the sawcarriage 1, near one end of said beams are secured a pair'of knuckles39, respectively, by means of bolts 48 and nuts 4|, which bolts extenddownwardly through the lower flanges 42 of said I-beams 8 and throughbase flanges 43 of said knuckles, and said nuts being threaded on thelower ends of said bolts and tightened against said knuckle flanges 43for holding said knuckle flanges against said I-beam base flanges 42 asclearly shown in Fig. 4 of the drawings. A pivot rod 44 extendstransversely under the saw carriage 1, with the ends of said rodextending through and secured in said knuckles 39, as shown in Figs. 3and 4 of the drawings. A hinge knuckle 45 is fitted between the knuckles39, and through said hinge knuckles extends the pivot rod 44, on whichrod said hinge knuckle may turn. Said hinge knuckle 45 is formed at itslower side with a depending longitudinal web 46 and with a pair ofspaced transverse bracing webs 41 extend ing from each side of saidlongitudinal web, on the lower ends of which webs is formed a horizontalsupporting plate 48, for supporting a pair of crank bearings 49 and a,transmission shaft bearing 50. The crank bearings 49 are each formedwith a pair of base flanges 49' at the upper and opposite sides thereof,which flanges are secured to the lower side of the plate 48 by bolts 5|and nuts 52, whereby said crank bearings are detachably secured to saidplate, and in said crank bearings 49 are J'ournaled the end portions ofa crank shaft 53 which extends transversely under and across the sawcarriage on the same level as the crank shaft 26. On one end of saidcrank shaft 53 is formed a crank 54, which comprises a radial crank bar55, se-' cured nearer one end thereof than the other on said end of saidcrank shaft, and a crank pin 56 secured at one end and to the shorterarm 51 of said crank bar and extending outwardly from said crank bar asshown in Figs. 1, 2 and 3 of the drawings. A balance hand wheel 58 issecured on the end of the crank shaft 53 opposite the end thereof onwhich the crank 54 is formed. The transmission shaft bearing is formedon the lower end of a bracket 59 depending from the supporting plate 48,which bracket is formed with a horizontal base flange 68 which isdetachably secured to theunder side of said supporting plate by bolts GIand nuts 62.

The crank shaft 53 is rotated from the crank shaft 26 through the mediumof a beveled pin ion 63, a beveled gear 64 in mesh with said beveledpinion, a transmission shaft 65, a universal joint 66, a slip joint 61,a beveled gear 68, and a bevel pinion 69. The transmission shaft 65 isformed in three sections 10, H and 12. The section 10 of thetransmission shaft 65 is journaled in a bearing 18' near the end of saidsection on which the beveled gear 64 is secured, said bearing 10 beingsecured to a cross bar 8' secured to the under side of the longitudinalside beams 8 of the saw carriage I. The section 12 of the transmissionshaft 65 is journaled in the bearing 50. The beveled pinion 63 issecured on the crank shaft 26 and the beveled gear 64 is secured on thenear end of the transmission shaft section 16. The universal joint 66includes two members 13 and 14, which are universally connected togetheras at 66 and secured on the adjoining ends respectively of thetransmission shaft sections 10 and H. The slip joint 61 comprises a malemember 15 and a female member 16 on the adjoinin ends of thetransmission shaft sections H and 12, respectively, said male membercomprising a plurality of longitudinal splines 11, and said femalemember being in the form of a socket provided with a plurality oflongitudinal grooves 18 in the inner side of its longitudinal socketWall, into which grooves the splines 11 of said male member slidablyfit. 0n the end of the transmission shaft section 12, opposite the endon which the female member 16 of the slip joint 61 is secured, issecured the beveled gear 68 in mesh with the beveled pinion 69 which issecured on the crank shaft 53.

A reciprocative and oscillative stone-cutting saw is pivotally suspendedat its ends, respectively, on the cranks 21 and 54,. which saw comprisesa saw frame BI and one or more stonecutting saw blades 82 secured attheir ends in said saw frame. The saw frame 8| comprises a pair ofslightly spaced longitudinal tubular struts 83 and 84, and a pair offlat-sided transverse end members 85 and 86, which are secured,respectively, at their inner sides and at their inner end portions tothe opposite ends of said struts 83 and 84. Said end members 85 and 86are provided with slots 81 and 88, respectively, extending. transverselytherethrough, through which slots extend keys 89 and 9|), respectively,for holding, and adjusting the tension of the saw blades 82 in the sawframe 8|. The keys 89 are formed with heads 9| on their outer ends, forengaging the outer side of the frame end member 85, and pins 92 aresecured in the inner ends of said keys extending from one side thereofthrough apertures 93 in the adjacent ends of the saw blades 82,respectively. In the inner ends of the keys 98 are secured pins 94projecting from one side of said keys through apertures 95 in theadjacent ends of the saw blades 82, and the outer ends of said keys 96are provided with vertical slots 96 extending therethrough, throughwhich slots are driven wedges 91, which engage the outer ends of saidslots and the outer side of the end frame member 86, whereby said keys96 are drawn outwardly in the end frame member 96, and the pins 94,engaging the apertures 95 in the adjacent ends of the saw blades 82,draw said blades taut. to the desired tension between said pins 94 andthe pins 92 in the inner ends of the keys 89 engaging the apertures 93in the adjacent end of the saw blades 82 and drawing the heads 9| ofsaid keys 89 against the outer side of the end frame member 85. The sawblades 82 are held near their ends, respectively, in suitable spacedrelation, according to the desired thickness of the slabs of stone to becut by said blades, and the ends of the blades are held in positionagainst displacement on the key pins "92 and 94 by spacing blocks '98and 99 and set screws I and i0! threaded in and extending through lugsI02 and I03 projecting laterally from the outer ends of the end members85 and 86, respectively, of the saw frame til, the ends of said setscrews engaging the spacing blocks 98 and 99 at the outer side of theoutermost saw blade 82,, with Said remaining spacing blocks placedbetween said saw blades except one of each of said blocks placed betweenthe innermost blade 82 and the saw frame strut 34 in alignment with"said set screw, so that said spacing biocks may be tightened againstsaid blades by said set screws for effectively holding said saw bladesin their properly spaced relationship. A pair of spaced bearings I34 arebolted to the upper side of the end frame member 85 of the saw frame 8|,through which the pin 29 of crank 2'! extends and in which said crankpin is journaled, whereby one end of the saw 80 is swingably suspendedon said crank pin 29. A pair of spaced bearings I05 are bolted to theupper side of the end frame 86 of the saw frame 8|, through which thepin 56 of crank 54 extends and in which said crank pin is journaled,whereby the other end of the saw 80 is swingably suspended on said crankpin 56.

A track I05 extends across and is secured to the upper side of the basebeams 2 of the frame I, upon which track the wheels I01 of a flat carI08 travel, so that a block of stone I10 such as marble, may betransported on said car and brought and supported by said car under thesaw 80 to enable said saw to saw said block of stone in the mannerhereinafter more fully described.

The operation of our invention is as follows:

The saw carriage I and saw 80 being raised to a suitable elevation bythe saw carriage feed mechanism, through the medium of the pulley 23,shaft I9, beveled pinions I8 and I6, screwshafts II and threadedopenings I5, through which said screw rods extend in threaded engagementtherewith, and a block of stone, such as marble H0, being placed uponthe flat car I08 and said car rolled along the track I06 to a positionwhere said block of stone rests directly under said saw 80, the motor 34is started, whereupon the crank shaft 26 and crank 21 are rotatedclockwise, as illustrated in Fig. 1 of the drawings, through the mediumof the motor shaft 31 and pulleys 35, and the belts 35 extending oversaid motor pulley and the pulleys 38 secured on said crank shaft 25,while the crank shaft 53 and crank 54 are rotated counterclockwise, fromthe crank shaft 26, through the inedium of beveled pinion 63, beveledgear 64, transmission shaft 65, universal joint 56;" slip joint 61,beveled gear 58 and beveled pinion 69, and the saw 80 is reciprocatedand oscillated by said cranks 21 and 54, as illustrated in Figs. 6, 7and 8 of the drawings, which movement of said saw causes the saw bladesto cut the block of stone I In on an are indicated I I2 in Figs. 6, 7and 8 of the drawings. During the reciprocating and oscillatingmovements of the saw 80 in cutting the stone on an arc, as aforesaid,the saw blades 82 assume different positions, i. e., from an inclinedposition, extending downwardly from a point coinciding with the centerof the crank shaft 53 to a point directly below the crank shaft 26, asshown in Fig. 6, to a horizontal position slightly below said crankshafts, as shown in Fig. "7, and from said horizontal position to aninclined position extending'in the opposite direction from that shown inFig. 6, from a point coinciding with the center of the crank shaft 26 toa point directly below the crank shaft 53, as shown in Fig. 8 of thedrawings. The movements of the saw '80 from one position to another, as"illustrated in Figs. 6, '7 and 8, causes the distance between the crankshafts '26 and 53; the length of the transmission shaft 65; and therelative positions of the transmission shaft sections 10 and TI to vary,which variations are provided for by the pivoted crank shaft bearing 49on the pivot rod 44, by the slip joint 61, and by the universal joint66, said bearing and said slip joint providing, respectively, for thevariation in distance between said crank shafts and the variation in thelength of said transmission shaft, and said universal joint providingfor the relative variation of the position of the axes of thetransmission shaft sections I0 and I I. Water is fed to the saw blades82, in any suitable manner, to prevent said blades from overheating, andto wash out of the cuts, made in the stone by the saw blades, the sawcuttings of the stone and the mud formed by the stone saw dust and saidwater, during the operation of the saw 80. Applicants saw, in cuttingthe stone on an arc, contacts and cuts the stone at one point, only, atany time, with all of the pressure of the saw applied to said pointduring the cutting operation of the saw, as illustrated in Figs. 6 to 8inclusive. As the saw cuts the stone, the saw blades 82 are moveddownwardly to maintain the cutting edges of said blades in sawingcontact with the stone, by means of the feed mechanism (not shown)through the medium of the pulley 23, shaft I9, beveled gears I8 andbeveled pinions I6, screw rods II and threaded openings I5 in the endblocks 9 of the saw carriage "I, the threads of which openings areengaged by the threads of said screw rods.

In the use of our stone sawing machine any suitable stone saw blade maybe used, such as a plain edge toothless blade, an ordinary toothedblade, or a diamond-tooth blade.

We do not limit our invention to the exact construction and arrangementdisclosed herein, since various changes therein may be made withoutdeparting from the spirit of the invention.

We claim:

1. A stone-sawing machine including a pair of crank shafts, fixedbearings, in which one of said crank shafts is journaled, floatingbearings in which said other crank shaft is journaled to permit saidlatter crank shaft to be moved toward or away from said first crankshaft, during rotation of said crank shafts in opposite directions,means for rotating said crank shafts as aforesaid, cranks on said crankshafts, respectively, a saw pivotally mounted at its ends on saidcranks, respectively.

2. A stone-sawing machine as claimed in claim 1 in which the means forrotating the crank shafts includes means for rotating said crank shaftjournaled in said fixed bearings, a transmission shaft formed in threesections, means whereby one of the end sections of said transmissionshaft is rotated at its outer end by said crank shaft journaled in saidfixed bearings, means whereby said crank shaft journaled in saidfloating bearings is rotated by the outer end of the other end sectionof said transmission shaft, a universal joint connecting the inner endof said first named end section of said trans- 7. mission shaft to theadjacent end of the intermediate section of said transmission shaft, anda slip joint connecting the inner end of said last named end section ofsaid transmission shaft to the adjacent end of said intermediate sectionof said transmission shaft.

3. A stone-sawing machine including a pair of crank shafts, fixedbearings, in which one of said crank shafts is journaled, floatingbearings in which said other crank shaft is journaled to permit saidlatter crank shaft to be moved toward or away from said first crankshaft, during rotation of said crank shafts in opposite directions,means for rotating said crank shafts as aforesaid, cranks on said crankshafts, respectively, a saw pivotally mounted at its ends on saidcranks, respectively, said means for rotating said crank shafts inopposite directions comprising means for rotating in one direction, saidREFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 333,510 Frenier Jan. 5, 1886432,183 Frenier July 15, 1890 2,135,047 Carpenter Nov. 1, 1938 2,411,585Minkler et al Nov. 26, 1946

